Your web page shows exacly what I got in my calculations, when I used the
tire's size numbering.
Incidentally, I use my own home-baked Excel spreadsheet in case anyone's
interested. Power & torque, graphs of the curves, tire sizes and gear ratios,
forward Gs of acceleration thrust, etc. are all calculated.
There's also a cool Java program called "Car Test" that does all this and much
more. You can put in your own numbers, or use the database of at least a
thousand cars with all their specs (that you can edit and augment). Very nice
program written by a guy named Pat Glenn. It's also useful for predicting
"what if" scenarios, like "what if I changed my differential ratio from X to
Y, how would it affect my 0-60 time?", or like "What if Mazda put a 250 hp
rotary in a 2300 lb. Miata, how fast would it go?".
Regards,
-----Original Message-----
From: owner-ba-autox@autox.team.net
[mailto:owner-ba-autox@autox.team.net]On Behalf Of John J. Stimson-III
Sent: Wednesday, October 24, 2001 17:07
To: ba-autox@autox.team.net
Subject: Enough already
You know, I just said I thought that none of us would have problems
with the calculations, but in my haste I think I reversed the 4.1/4.3
factor in *estimating* the tope speed in 2nd & 3rd for the 94-97
Miatas.
I've updated my own personal table of Miata gearings with the pre-99
cars, and the results are here:
http://www.idsfa.net/miata/gearing.html
Surprisingly, the numbers that I cranked out with the calculator for
the 6-speed with 16" tires are dead-on with what I see on the
speedometer. Maybe my speedometer is actually correct!
If someone knows the rev-limit speed for the 1.6L engine, let me know
and I'll finish the top speed table.
Craig, are you happier with those numbers?
If anyone catches any errors on that page, email me privately. I
think the non-Miata list members are getting bored!
--
john@idsfa.net John Stimson
http://www.idsfa.net/~john/ HMC Physics '94
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